Valve.



C. E. STRECKER.

VALVE.

APPLICATION FILED APR. 8. I9I3.

,l44,875 Patented June 29, 1915.

@Mw Q fio ETD ST s ramener irren CHARLES n. srnncKER, or Monreal-marianne, CANADA.

VALVE.

To all whom it may concern: n' i Be it lrnown that I, CHARLES E. S'rRnoKER, of the city of Montreal, inthe Province kof Quebec rand Dominion of Canada, have invented certain new and useful Improvements in Valves, of which the following is a full, clear, and exact description. This invention relatesk to improvements in valves, and more particularly to gate valves, and the object is to provide a valve of vsimple and inexpensive construction having the gate formed in two parts each engaging a separate seat. u l y A further object is to provide 'a gate valve so arranged that the lodgment of foreign matter' on oney of the seats or gate members will not prevent the accurate seating of the other gate member.r

A' till further object is to providek agate valve having af two part gate adapted for use with the Astationary spindle.

To accomplish these objects, I provide a! valve body of the usual design havingfa sta,

tionaryspindle. The gate is formed in two parts each having two lugs and ytwo pockets, adapted to coperate with corresponding' elements on `the other yportion ofthe gate and formed to permit the two portions to move in any direction independently.L A spindle nut is secured betweenthe gate portions. In the drawings which illustrate the invention:-Figure 1 is a vertical sectional view of the valve. Fig. 2 is a view partly in elevation and partly in section on the line 2 2, Fig. 1. Fig. 3 is a horizontal section on the line 3 3, Figs. 1 and 2.

Referring more particularly to the drawings, 5 designates a gate valve body formed in as many parts as desired, and provided with a spindle 6. If the valve is of the stationary spindle type, as shown in the drawings, the spindle is provided with a collar 7 held against vertical movement by the parts of the valve, and thus holding the spindle against similar movement but not against rotary movement. In the lower part of the body are two gate seats 8 arranged in planes converging toward the bottom of the valve.

The gate consists of a pair of similar members 9 having their opposite faces 10 arranged in converging planes parallel with the planes of the seats 8, so that normally the gate will bear evenly on both `seats and form a fluid tight joint entirely around the seats. The upper part of each gate is suit- Specication of Letters Patent.

' the ylugs.

ythe center of said sphere being at the intersection of the horizontal axis of the member with its seating surface r10. This point of intersection is designated 15. The pockets 14 of each gate member have their bot- Fatented June 29, 1915. Application filed April 8, 1913. SerialNo. 759,670. 'i l toms spherically curved, the center of said spherebeing the point 1K5 ofthe other gate member. This arrangement of pocket and lug curvatures is obviously such ythat the curvature of the lugs on one member exactly coincides with the curvature of the pockets on the other member, so that the two gate members may be moved with respect to one another in anydirection. ln other words. the "lugs andy pockets form a universal or ball andv socket joint between the two gate members. In orderto permit this independentmovement of the gate members, their ad-` jacentedges are cut away so as to leave a. spacewl. In order to insure perfect move-` mentin all directions, the lower sides of the upper vlugs 18 and the upper sides of the lower lugs are curved, as indicated at 17, so that these lugs will rock on one another and permit the gate members to assume any position. If this curvature were not provided the lugs would bind during movement in one direction, and thus detract from the eliiciency of the device.

The gate members are provided at their adjacent edges with lugs 18 arranged diametrically opposite, and adapted to move vertically between guides 19 formed on the inner surface of the valve body in the usual manner. These guides operate to hold the gate members in engagement with one another when the gate is raised into the upper part of the body. It will be seen from Figs. 2 and 3 that the lugs 13 are spaced sul'liciently apart to leave room between them for the stem 6, so that the gate may be raised until the stem engages the bottom of the that, itk will not standv long usage without` It is obviousthat this particular form of gate may be applied to a rising stem fvailve by placing the collar 7 between the gate members and attaching the nut 11 to the valve body.

The operation of the device is very simple. When the spindle is rotated,the nut moves upwardly and draws up the gate,which normally operates as if made in one solid piece.

W'hen closed, the` gate wedges between the f nection so as to have movement in two directionsv or with a largel ball and socket jointv located. at the center of the. members. The first. mentioned arrangement obviously adjusts itself in only two directions, while the second arrangement has the disadvantage thatone gate member is much heavier than thel other, and'v that the lighter or socket member is so: much weakened: at the center buckling. Furthermore, this central arrangement of theball and socket prohibits the use of a stationary spindle without increasing thev dimensions of the body to an utterly impractical and uncommercial eX- tent.

r From. the, foregoing,

The other gateY it will be seen that the present. invention .provides a valvegate of superior design vhaving allthe advantages f 2. In a valve, a body,a gate composed of two similar members, a pair of lugs on each gate member, and a pairl of: recesses 1n each gate memberv positioned to receive the lugsk of the other member, said lugs and recesses having their abutting surfaces spherically curved, the center of said curvature beingat the center ofthe-outer sideof said gate;

3. Ina valve, a body, agate conrmrisingy two similar members having seat surfaces on their remote faces, a pair oflugs anda pair of recesses formedon the adjacent faces of said members, the lugs ofy one member. being positioned to engage in the recessesof the other member, said lugs having their out-erf .surfaces spherically curved.. from a center coincident with the center ofthe seating face, and said recesses having their bottomsk `spherically curved from a .center coincident .with the. center of the Seating face of the other member.

Inwitness whereofI have hereuntoset my hand in the presence:oftwowitnesses CHARLES E.` STRE CKER;

Witnesses: v

STUART R.V W'. ALIEN, Gr. M. MORELAND.

Copies'of thisr patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

- Washington, D. C, f 

